Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2004

done Chhattisgarh PMT Solved Paper-2004

  • question_answer1) Dimensions of which of the following three quantities are the same?

    A) Work, energy, force

    B) Velocity, momentum, impulse

    C) Potential energy, kinetic energy, momentum

    D) Pressure, stress, coefficient of elasticity

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  • question_answer2) From the following pairs, choose the pair that does not have identical dimensions.

    A) Angular momentum and Planck's constant

    B) Moment of inertia and moment of force

    C) Work and torque

    D) Impulse and momentum

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  • question_answer3) A body starts to fall freely under gravity. The distance covered by it in first, second and third second are in ratio

    A) 1 : 3 : 5

    B) 1 : 2 : 3

    C) 1: 4: 9

    D) 1: 5 : 6

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  • question_answer4) For a projectile on the horizontal surface of a planet \[y=8t-5{{t}^{2}}\] m shows height and \[x=8\,t\]m shows the horizontal distance, then the velocity with which the projectile is projected is

    A) 8m/s

    B) 6 m/s

    C) 10 m/s

    D) 100 m/s

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  • question_answer5) A motorcycle is going on an over bridge of radius R. The driver maintains a constant speed. As the motorcycle is ascending on the over bridge, the normal force on it

    A) increases

    B) decreases

    C) remains the same

    D) fluctuates

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  • question_answer6) A body of mass 0.5 kg is projected under gravity with a speed of 98 m/s at an angle of \[60{}^\circ \] with the horizontal. The change in momentum (in magnitude) of the body is

    A) 24.5 N-s

    B) 49.0 N-s

    C) 98.0 N-s

    D) 50.0 N-s

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  • question_answer7) A body of mass 10 kg is moving with a constant velocity of 10 m/s. When a constant force acts for 4 s on it, it moves with a velocity 2 m/s in the opposite direction. The acceleration produced in it is

    A) 3 m/s2

    B) - 3 m/s2

    C) 0.3 m/s2

    D) - 0.3 m/s2

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  • question_answer8) A body of mass M is kept on a rough horizontal surface [friction coefficient =u). A person is trying to pull the body by applying a horizontal force F but the body is not moving then

    A) \[F=Mg\]

    B) \[F=\mu Mg\]

    C) \[Mg\le F\le Mg\sqrt{1+{{\mu }^{2}}}\]

    D) \[Mg\ge F\ge Mg\sqrt{1+{{\mu }^{2}}}\]

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  • question_answer9) A bullet of mass m moving with velocity v strikes a block of mass M at rest and gets embedded into it. The kinetic energy of the composite block will be

    A) \[\frac{1}{2}m{{v}^{2}}\times \frac{m}{(m+M)}\]

    B) \[\frac{1}{2}m{{v}^{2}}\times \frac{M}{(m+M)}\]

    C) \[\frac{1}{2}m{{v}^{2}}\times \frac{(M+m)}{M}\]

    D) \[\frac{1}{2}M{{v}^{2}}\times \frac{m}{(m+M)}\]

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  • question_answer10) One-fourth length of a spring of force constant k is cut away. The force constant of the remaining spring will be

    A) \[\frac{3}{4}k\]

    B) \[\frac{4}{3}k\]

    C) k

    D) 4k

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  • question_answer11) The force constants of two springs are \[{{k}_{1}}\] and\[{{k}_{2}}\] respectively. Both are stretched till their potential energies are equal. The forces \[{{f}_{1}}\] and \[{{f}_{2}}\] applied on them are in the ratio

    A) \[{{k}_{1}}:{{k}_{2}}\]

    B) \[{{k}_{2}}:{{k}_{1}}\]

    C) \[\sqrt{{{k}_{1}}}:\sqrt{{{k}_{2}}}\]

    D) \[\sqrt{{{k}_{2}}}:\sqrt{{{k}_{1}}}\]

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  • question_answer12) A fighter plane is moving in a vertical circle of radius r. Its minimum velocity at the highest point of the circle will be

    A) \[\sqrt{3gr}\]

    B) \[\sqrt{2gr}\]

    C) \[\sqrt{gr}\]

    D) \[\sqrt{gr/2}\]

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  • question_answer13) A spring of length L and uniform cross-section is spread on a smooth plane. One of its ends is pulled by a force F. Find the tension in it at a distance I from this end.

    A) \[\frac{l}{2}F\]

    B) \[\frac{L}{l}F\]

    C) \[\left( 1-\frac{l}{L} \right)F\]

    D) \[\left( 1+\frac{l}{L} \right)F\]

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  • question_answer14) A particle is making uniform circular motion with angular momentum J. If its kinetic energy is made half and angular frequency be doubled, its new angular momentum will be

    A) 2J

    B) 4J

    C) J/2

    D) J/4

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  • question_answer15) Three rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY' will be

    A) 3 MR2

    B) 3/2 MR2

    C) 5 MR2

    D) 7/2 MR2

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  • question_answer16) If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would

    A) decrease by 1%

    B) remain unchanged

    C) increase by 1%

    D) increase by 2%

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  • question_answer17) A satellite is moving around the earth with speed v in a circular orbit of radius r. If the orbit radius is decreased by 1%, the speed of the satellite will

    A) increase by 1%

    B) increase by 0.5%

    C) decrease by 1%

    D) decrease by 0.5%

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  • question_answer18) How much energy will be necessary for making a body of 500 kg escape from the earth? \[\text{ }\!\![\!\!\text{ g}\,\text{=}\,\text{9}\text{.8}\,\text{m}{{\text{s}}^{2}},\] radius of the earth \[\text{6}\text{.4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{6}}}\text{m }\!\!]\!\!\text{ }\]

    A) About \[9.8\times {{10}^{6}}J\]

    B) About \[6.4\times {{10}^{8}}J\]

    C) About \[3.1\times {{10}^{10}}J\]

    D) About \[27.4\times {{10}^{12}}J\]

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  • question_answer19) A wire of length L and cross-sectional area A is made of a material of Young's modulus Y. It is stretched by an amount x. The work done is

    A) \[YxA/2L\]

    B) \[Y{{x}^{2}}A/L\]

    C) \[Y{{x}^{2}}A/2L\]

    D) \[2Y{{x}^{2}}A/L\]

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  • question_answer20) A capillary tube, made of glass, is dipped into mercury. Then,

    A) mercury rises in the capillary tube

    B) mercury rises and flows out of the capillary tube

    C) mercury descends in the capillary tube

    D) mercury neither rises nor descends in the capillary tube

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  • question_answer21) At which of the following temperature the root mean square velocity of gaseous hydrogen molecules will be equal to root mean square velocity of oxygen molecules at \[47{}^\circ C\]. ?

    A) 20 K

    B) 80 K

    C) - 73 K

    D) 3 K

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  • question_answer22) The pressure of a gas in a vessel is \[{{P}_{0.}}\] masses of all the molecules are halved and their speeds are doubled, the resulting pressure \[p\] will be

    A) \[4{{p}_{0}}\]

    B) \[{{p}_{0}}/2\]

    C) \[{{p}_{0}}\]

    D) \[2{{p}_{0}}\]

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  • question_answer23) For a gas, if\[\gamma =1.4,\] then atomicity \[{{C}_{p}}\] and\[{{C}_{v}}\] of the gas are respectively

    A) monoatomic, 5/2 R, 3/2 R

    B) monoatomic, 7/2 R, 5/2 R

    C) diatomic, 7/2 R, 5/2 R

    D) triatomic, 7/2 R, 5/2 R

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  • question_answer24) During the adiabatic expansion of 2 moles of a gas, the change in internal energy was found to be equal to -100 J. The work done during the process will be equal to

    A) zero

    B) -100 J

    C) 200 J

    D) 100 J

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  • question_answer25) In an adiabatic expansion of a gas initial and final temperatures are \[{{T}_{1}}\] and \[{{T}_{2}}\] respectively, then the change in internal energy of the gas is

    A) \[R\text{/ }\!\!\gamma\!\!\text{ }-1({{T}_{2}}-{{T}_{1}})\]

    B) \[R\text{/ }\!\!\gamma\!\!\text{ }-1({{T}_{1}}-{{T}_{2}})\]

    C) \[R({{T}_{2}}-{{T}_{1}})\]

    D) zero

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  • question_answer26) The lengths and radii of two rods made of same material are in the ratio 1:2 and 2:3 respectively. If the temperature difference between the ends for the two rods be the same, then in the steady state, the amount of heat flowing per second through them will be in the ratio

    A) 1 :1

    B) 4 : 3

    C) 8 : 9

    D) 3 : 2

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  • question_answer27) Which of the following makes the best choice for cooking utensils?

    A) High specific heat and high conductivity

    B) Low specific heat and low conductivity

    C) High specific heat and low conductivity

    D) Low specific heat and high conductivity

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  • question_answer28) A hot liquid takes 5 min to cool from \[70{}^\circ C\] to \[60{}^\circ C\]. How long will it take to cool from \[60{}^\circ C\] to \[50{}^\circ C\]?

    A) 5 min

    B) more than 5 min

    C) less than 5 min

    D) less or more than 5 min depending on the nature of liquid

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  • question_answer29) At temperature T, the power radiated by a body is Q watt. At the temperature 3T, the power radiated by it will be

    A) 3Q

    B) 9Q

    C) 27 Q

    D) 81 Q

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  • question_answer30) A particle of mass 10 g is executing simple harmonic motion with an amplitude of 0.5 m and periodic time of (\[\text{ }\!\!\pi\!\!\text{ /5}\]) second. The maximum value of the force acting on the particle is

    A) 25 N

    B) 5 N

    C) 2.5 N

    D) 0.5 N

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  • question_answer31) The period of vibration of a mass m suspended from a spring is 2 s. If along with it another mass of 2 kg is also suspended, the period of oscillation increases by one second. The mass m will be

    A) 2 kg

    B) 1 kg

    C) 1.6kg

    D) 2.6 kg

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  • question_answer32) A particle is executing simple harmonic motion with frequency\[f.\] The frequency at which its kinetic energy changes into potential energy is

    A) \[f\text{/2}\]

    B) \[f\]

    C) \[2f\]

    D) \[4f\]

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  • question_answer33) The lengths of two open organ pipes are \[l\] and \[(l+\Delta l)\] respectively. Neglecting end correction the frequency of beats between them will be approximately

    A) \[\frac{v}{2l}\]

    B) \[\frac{v}{4l}\]

    C) \[\frac{v\Delta l}{2{{l}^{2}}}\]

    D) \[\frac{v\Delta l}{l}\] (here v is the speed of sound)

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  • question_answer34) A source of sound is moving with constant velocity of 20 m/s emitting a note of frequency 1000 Hz. The ratio of frequencies observed by a stationary observer while the source is approaching him and after it crosses him will be (speed of sound v = 340 m/s)

    A) 9 : 8

    B) 8 : 9

    C) 1:1

    D) 9 :10

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  • question_answer35) The equation of a stationary wave is \[y=0.8\,\cos \,\left( \frac{\pi x}{20} \right)\,\sin \,200\,\pi t\] where x is in and t is in sec. The separation between consecutive nodes will be

    A) 20 cm

    B) 10 cm

    C) 40cm

    D) 30cm

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  • question_answer36) The distance travelled by light in glass (refractive index = 1.5) in a nanosecond will be

    A) 45cm

    B) 40cm

    C) 30cm

    D) 20cm

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  • question_answer37) Two phase related and monochromatic beams of light have intensities \[I\] and \[4I.\] Possible maximum and minimum intensities in the resultant beam obtained due to superposition are,

    A) \[5I\,\text{and}\,I\]

    B) \[5I\,\text{and}\,3I\]

    C) \[9I\,\text{and}\,3I\]

    D) \[9I\,\text{and}\,I\]

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  • question_answer38) A light ray is incident normally on a plane mirror. The angle of reflection will be

    A) \[135{}^\circ \]

    B) \[90{}^\circ \]

    C) \[45{}^\circ \]

    D) \[0{}^\circ \]

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  • question_answer39) If refractive indices of water and glass with respect to vacuum be 4/3 and 3/2 respectively, the refractive index of glass with respect to water will be

    A) 9/8

    B) 8/9

    C) 1

    D) 2

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  • question_answer40) Light passes from vacuum into glass at incident angle \[45{}^\circ \]. Which property of the light wave remains unchanged?

    A) Direction of motion

    B) Speed

    C) Wavelength

    D) Frequency

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  • question_answer41) A convex lens has a focal length\[f.\] It is cut into two parts along the dotted line as shown in the figure. The focal length of each part will be

    A) \[f\text{/2}\]

    B) \[f\]

    C) \[\text{3/2}f\]

    D) \[2f\]

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  • question_answer42) The nature of sun's spectrum is

    A) continuous spectrum with absorption lines

    B) lines spectrum

    C) the spectrum of the helium atom

    D) band spectrum

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  • question_answer43) A defective eye cannot see close objects clearly because their image is formed

    A) on the eye lens

    B) between eye lens and retina

    C) on the retina

    D) beyond retina

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  • question_answer44) A telescope of diameter 2 m uses light of wavelength \[5000\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] for viewing stars. The minimum angular separation between two stars whose image is seen just resolved by this telescope is

    A) \[0.31\times {{10}^{-6}}\,\text{rad}\]

    B) \[0.25\times {{10}^{-6}}\,\text{rad}\]

    C) \[0.6\times {{10}^{-3}}\,\text{rad}\]

    D) \[0.5\times {{10}^{-3}}\,\text{rad}\]

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  • question_answer45) Velocity of light is minimum in

    A) vacuum

    B) water

    C) glass

    D) diamond

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  • question_answer46) A particle of mass m and charge q is accelerated through a potential difference of V volt. Its energy will be

    A) \[qV\]

    B) \[mqV\]

    C) \[(q/m)V\]

    D) \[q/V\]

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  • question_answer47) Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV, The minimum kinetic energy of the emitted photoelectrons will be

    A) zero

    B) 1 eV

    C) 2eV

    D) 10 eV

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  • question_answer48) For the photoelectric effect, the maximum kinetic energy (KE) of the emitted photoelectrons is plotted against the frequency v of the incident photons as shown in the figure. The slope of the curve gives

    A) charge of the electron

    B) work function of the metal

    C) Planck's constant

    D) ratio of the Planck's constant to electronic charge

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  • question_answer49) The unit of Planck's constant h is that of

    A) energy

    B) work

    C) linear momentum

    D) angular momentum

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  • question_answer50) Light of frequency \[4{{v}_{0}}\] is incident on the metal of the threshold frequency \[{{v}_{0}}.\] The maximum kinetic energy of the emitted photoelectrons is

    A) \[3h{{v}_{0}}\]

    B) \[2h{{v}_{0}}\]

    C) \[\frac{3}{2}h{{v}_{0}}\]

    D) \[\frac{1}{2}h{{v}_{0}}\]

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  • question_answer51) An electron and a proton are kept in a uniform electric field. The ratio of their acceleration will be

    A) unity

    B) zero

    C) \[{{\text{m}}_{p}}\text{/}{{\text{m}}_{\text{e}}}\]

    D) \[{{\text{m}}_{e}}\text{/}{{\text{m}}_{p}}\]

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  • question_answer52) In a X-ray tube. X-rays are produced by electrons accelerated by V volt. The maximum frequency of the X-rays is

    A) \[ehV\]

    B) \[hV\text{/e}\]

    C) \[eh\text{/V}\]

    D) \[eV\text{/h}\]

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  • question_answer53) The penetrating power of X-rays can be increased by

    A) increasing the current in the filament

    B) decreasing the current in the filament

    C) increasing the potential difference between the cathode and the anode

    D) decreasing the potential difference between the cathode and the anode

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  • question_answer54) Two wires P and Q made up of different materials have same resistance at room temperature, when heated, resistance of P increases and that of Q decreases. We conclude that

    A) P and Q both are conductors but because of being made of different materials it happens so

    B) P is n-type semiconductor and Q is p-type semiconductor

    C) P is semiconductor and Q is conductor

    D) P is conductor and Q is semiconductor

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  • question_answer55) The band gap in germanium and silicon in eV respectively is

    A) 0.7,1.1

    B) 1.1, 0.7

    C) 1.1, 0

    D) 0,1.1

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  • question_answer56) A full wave rectifier circuit along with the input and output voltages is shown in the figure. The contribution to output voltage from diode 2 is

    A) A, C

    B) B, D

    C) B,C

    D) A,D

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  • question_answer57) The electron in the lowest (n = 1) orbit in hydrogen atom has energy - 13.6 eV. How much energy is required to ionize a hydrogen atom which is already in the first excited level?

    A) 3.4 eV

    B) 10.2 eV

    C) 13.6 eV

    D) 1.9 eV

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  • question_answer58) The ratio of minimum to maximum wavelength in Balmer series is

    A) 5 : 9

    B) 5 : 36

    C) 1 : 4

    D) 3 : 4

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  • question_answer59) A nucleus \[_{z}^{A}X\] emits an a-particle. The resultant nucleus emits \[a\text{ }\!\!\beta\!\!\text{ -}\]particle. The respective atomic and mass numbers of the final nucleus will be

    A) Z - 3, A - 4

    B) Z -1, A - 4

    C) Z - 2, A - 4

    D) Z, A - 2

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  • question_answer60) What fraction of a radioactive material will get disintegrated in a period of two half-lives?

    A) Whole

    B) Half

    C) One-fourth

    D) Three-fourth

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  • question_answer61) At 0 K, intrinsic semiconductors behaves as

    A) a perfect conductor

    B) a super conductor

    C) a semiconductor

    D) a perfect insulator

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  • question_answer62) To obtain electrons as majority charge carries in a semiconductor, the impurity mixed is

    A) monovalent

    B) divalent

    C) trivalent

    D) pentavalent

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  • question_answer63) The ratio of forward biased to reverse biased resistance for p-n junction diode is

    A) 10-1 :1

    B) 10-2:1

    C) 10-3 :1

    D) 10-2 : 1

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  • question_answer64) For germanium crystal, the forbidden energy gap in joule is

    A) \[1.12\times {{10}^{-19}}\]

    B) \[1.76\times {{10}^{-19}}\]

    C) \[1.6\times {{10}^{-19}}\]

    D) zero

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  • question_answer65) The incorrect statement regarding the lines of force of the magnetic field B is

    A) magnetic intensity is a measure of lines of force passing through unit area held normal to it

    B) magnetic lines of force form a close curve

    C) inside a magnet, its magnetic lines of force move from north pole of a magnet towards its south pole

    D) magnetic lines of force never cut each other

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  • question_answer66) A bar magnet of magnetic moment M and length L is cut into two equal parts each of length L/2. The magnetic moment of each part will be

    A) M

    B) M/4

    C) \[\sqrt{2M}\]

    D) M/2

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  • question_answer67) When 2 A current is passed through a tangent galvanometer, it gives a deflection of \[30{}^\circ \]. For \[60{}^\circ \] deflection, the current must be

    A) 1A

    B) \[2\sqrt{3}\text{A}\]

    C) 4A

    D) 6 A

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  • question_answer68) At a certain place the horizontal component of the earth's magnetic field is \[{{B}_{0}}\] and the angle of dip is \[45{}^\circ \]. The total intensity of the field at that place will be

    A) \[{{B}_{0}}\]

    B) \[\sqrt{2}{{B}_{0}}\]

    C) \[2B_{0}^{{}}\]

    D) \[B_{0}^{2}\]

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  • question_answer69) The field at a point distant r from an electric dipole is proportional to

    A) 1/r

    B) 1/r2

    C) 1/r3

    D) r2

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  • question_answer70) What is the magnitude of a point charge which produces an electric field of 2 N/C at a distance of 60 cm? \[[\frac{1}{4\pi {{\varepsilon }_{0}}}=9\times {{10}^{9}}\text{N-}{{\text{m}}^{\text{2}}}\text{/}{{\text{C}}^{\text{2}}}\text{ }\!\!]\!\!\text{ }\]

    A) \[8\times {{10}^{11}}C\]

    B) \[2\times {{10}^{-12}}C\]

    C) \[3\times {{10}^{-11}}C\]

    D) \[6\times {{10}^{-10}}C\]

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  • question_answer71) As shown in the figure, charges +q and - q are placed at the vertices B and C of an isosceles triangle. The potential at the vertex A is

    A) \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{2q}{\sqrt{{{a}^{2}}+{{b}^{2}}}}\]

    B) \[\text{zero}\]

    C) \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{q}{\sqrt{{{a}^{2}}+{{b}^{2}}}}\]

    D) \[\frac{1}{4\pi {{\varepsilon }_{0}}}.\frac{(-q)}{\sqrt{{{a}^{2}}+{{b}^{2}}}}\]

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  • question_answer72) A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The electric field at the centre of the sphere will be

    A) 50V/m

    B) 10V/m

    C) 5V/m

    D) zero

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  • question_answer73) Angle between equipotential surface and lines of force is

    A) zero

    B) \[180{}^\circ \]

    C) \[90{}^\circ \]

    D) \[45{}^\circ \]

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  • question_answer74) After fully charging a parallel plate air capacitor, battery is removed. A dielectric slab is now put between the plates. For this incidence, the correct statement is

    A) charge on plates decreases

    B) charge on plates does not change , potential difference increases

    C) charge on plates does not change? potential difference decreases and energy stored decreases

    D) charge on plates does not change, potential difference increases and energy stored also increases

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  • question_answer75) A hollow metallic sphere of radius 3 cm 5 charged so that potential on its surface becomes 5 V. The potential at the centre of sphere will be (in volt)

    A) zero

    B) 5

    C) 3

    D) 10

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  • question_answer76) When a potential is applied across the ends of a linear metallic conductor, then

    A) the free electrons are accelerated continuously from the lower potential end to the higher potential end of the conductor

    B) the free electron are accelerated continuously from the higher potential end to the lower potential end of the conductor

    C) the free electrons acquire a constant drift velocity from the lower potential end to the higher potential end of the conductor

    D) the free electrons are set in motion from their position of rest

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  • question_answer77) In a neon discharge tube\[2.9\times {{10}^{18}}\] Ne ions move to the right each second, while\[1.2\times {{10}^{18}}\] electrons move to the left per sec, electron charge is \[1.6\times {{10}^{-19}}C.\] The current in the discharge tube is

    A) 1 A towards right

    B) 0.66 A towards right

    C) 0.66 A towards left

    D) zero

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  • question_answer78) When a resistance of 2\[\Omega \] is connected across the terminals of a cell, the current is 0.5 A. When the resistance is increased to 5\[\Omega ,\] the current is 0.25 A. The emf of the cell is

    A) 1.0 V

    B) 1.5V

    C) 2.0V

    D) 2.5V

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  • question_answer79) An electric heater, kept in vacuum, is heated continuously by passing electric current. Its temperature

    A) will go on rising with time

    B) will stop rising after sometime as it will lose heat to the surroundings by conduction

    C) will rise for sometime and thereafter will start falling

    D) will become constant after sometime because of loss of heat due to radiation

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  • question_answer80) Heat produced in a wire of resistance R due to current flowing at a constant potential difference is proportional to

    A) 1/R2

    B) 1/R

    C) R

    D) R2

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  • question_answer81) There are two electric bulbs of 40 W and 100 W. Which one will be brighter when first they are connected in series and then in parallel

    A) 40 W in series and 100 W in parallel

    B) 100 W in series and 40 W in parallel

    C) 40 W both in series and parallel will be uniform

    D) 100 W both in series and parallel will be uniform

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  • question_answer82) In charging a battery of motor car, the following effect of electric current is used

    A) magnetic

    B) heating

    C) chemical

    D) induction

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  • question_answer83) To convert the range of a G ohm resistance voltmeter from V to nV, the value of series resistance needed is

    A) \[(n-1)G\]

    B) \[\text{G/}n\]

    C) \[nG\]

    D) \[\text{G/}(n-1)\]

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  • question_answer84) If the angular momentum of an electron is \[\mathbf{\vec{J}},\] then the magnitude of the magnetic moment will be

    A) \[\frac{eJ}{m}\]

    B) \[\frac{eJ}{2m}\]

    C) \[eJ2m\]

    D) \[\frac{2m}{eJ}\]

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  • question_answer85) A 100\[\Omega \] galvanometer gives full scale deflection at 10 mA. How much shunt is required to read 100 mA?

    A) \[11.11\,\Omega \]

    B) \[9.9\,\Omega \]

    C) \[1.1\,\Omega \]

    D) \[4.4\,\Omega \]

    View Answer play_arrow
  • question_answer86) The ratio of the magnetic field at the centre of a current carrying coil of radius a and at a distance x from centre of the coil on its axial line is a

    A) \[\frac{1}{\sqrt{2}}\]

    B) \[\sqrt{2}\]

    C) \[\frac{1}{2\sqrt{2}}\]

    D) \[2\sqrt{2}\]

    View Answer play_arrow
  • question_answer87) On connecting a battery to the two comers of a diagonal of a square conductor frame of side \[a,\] the magnitude of the magnetic field at the centre will be

    A) zero

    B) \[\frac{{{\mu }_{0}}}{\pi a}\]

    C) \[\frac{2{{\mu }_{0}}}{\pi a}\]

    D) \[\frac{4{{\mu }_{0}}i}{\pi a}\]

    View Answer play_arrow
  • question_answer88) Lorentz force is given by the following formula

    A) \[\mathbf{\vec{F}}=q\mathbf{\vec{E}}\]

    B) \[\mathbf{\vec{F}}=q(\mathbf{\vec{V}}\times \mathbf{\vec{B}})\]

    C) \[\mathbf{\vec{F}}=q\mathbf{\vec{E}}+q(\mathbf{\vec{V}}\times \mathbf{\vec{B}})\]

    D) \[\mathbf{\vec{F}}=q\mathbf{\vec{E}}+q(\mathbf{\vec{B}}\times \mathbf{\vec{V}})\]

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  • question_answer89) When a charged particle enters in a uniform magnetic field, its kinetic energy

    A) remains constant

    B) increases

    C) decreases

    D) becomes zero

    View Answer play_arrow
  • question_answer90) A long sol enoid has n turns per metre and current \[I\] ampere is flowing through it. The magnetic field at the ends of solenoid is

    A) \[\frac{{{\mu }_{0}}nI}{2}\]

    B) \[{{\mu }_{0}}nI\]

    C) zero

    D) \[2{{\mu }_{0}}nI\]

    View Answer play_arrow
  • question_answer91) Biot-Savart law is given by the following formula [here k=\[({{\mu }_{0}}\text{/4 }\!\!\pi\!\!\text{ })]\]

    A) \[d\,\mathbf{\vec{B}}=ki\frac{d\mathbf{\vec{l}}\times \mathbf{\hat{r}}}{{{r}^{3}}}\]

    B) \[d\,\mathbf{\vec{B}}=k{{i}^{2}}\frac{d\mathbf{\vec{l}}\times \mathbf{\hat{r}}}{{{r}^{3}}}\]

    C) \[d\,\mathbf{\vec{B}}=ki\frac{d\mathbf{\vec{l}}\times \mathbf{\vec{r}}}{{{r}^{3}}}\]

    D) \[d\,\mathbf{\vec{B}}=ki\frac{\mathbf{\vec{r}}\times d\,\mathbf{\vec{l}}}{{{r}^{2}}}\]

    View Answer play_arrow
  • question_answer92) A circular coil of 500 turns of wire has an enclosed area of 0.1 m2 per turn. It is kept perpendicular to a magnetic field of induction 0.2 T and rotated by \[180{}^\circ \] about a diameter perpendicular to the field in 0.1 s. How much charge will pass when the coil is connected to a galvanometer with a combined resistance of son?

    A) 0.2 C

    B) 0.4 C

    C) 2 C

    D) 4 C

    View Answer play_arrow
  • question_answer93) The self-inductance of a solenoid of length \[l,\] area of cross-section A and having N turns is

    A) \[{{\mu }_{0}}{{N}^{2}}\text{A/}l\]

    B) \[{{\mu }_{0}}N\text{A/}l\]

    C) \[{{\mu }_{0}}{{N}^{2}}l\text{A}\]

    D) \[{{\mu }_{0}}N\text{A}l\]

    View Answer play_arrow
  • question_answer94) The frequency for which a 5uF capacitor has a reactance of 1/1000\[\Omega \] is given by

    A) 100/\[\pi \]MHz

    B) 1000/\[\pi \]Hz

    C) 1/1000 Hz

    D) 1000 Hz

    View Answer play_arrow
  • question_answer95) The unit of inductance is

    A) Volt/Ampere

    B) Joule/Ampere

    C) Volt x Second/Ampere

    D) Volt x Ampere/Second

    View Answer play_arrow
  • question_answer96) An alternating emf is applied to purely capacitive circuit. The phase relation between emf and current flowing in the circuit is

    A) emf is ahead of current by \[\text{ }\!\!\pi\!\!\text{ /2}\]

    B) current is ahead of emf by\[\text{ }\!\!\pi\!\!\text{ /2}\]

    C) current lags behind emf by\[\text{ }\!\!\pi\!\!\text{ }\]

    D) current is ahead of emf by \[\text{ }\!\!\pi\!\!\text{ }\]

    View Answer play_arrow
  • question_answer97) In a circuit, the value of the alternating current is measured by an ammeter as 10 A. Its peak value will be

    A) 10 A

    B) 20 A

    C) 14.14 A

    D) 7.07 A

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  • question_answer98) In a series L-C-R circuit, operated with an AC are angular frequency a, the total impedance s

    A) \[{{[{{R}^{2}}+{{(L\omega -C\omega )}^{2}}]}^{1/2}}\]

    B) \[{{\left[ {{R}^{2}}+{{\left( L\omega -\frac{1}{C\omega } \right)}^{2}} \right]}^{1/2}}\]

    C) \[{{\left[ {{R}^{2}}+{{\left( L\omega -\frac{1}{C\omega } \right)}^{2}} \right]}^{1/2}}\]

    D) \[{{\left[ {{(R\omega )}^{2}}+{{\left( L\omega -\frac{1}{C\omega } \right)}^{2}} \right]}^{1/2}}\]

    View Answer play_arrow
  • question_answer99) In a L-R circuit, the value of L is \[(0.\text{4/ }\!\!\pi\!\!\text{ })\] H sar the value of R is 30\[\Omega \]. If in circuit, an alternating emf of 200 V at 50 cycle/s is connected, the impedance of the circuit and current will be

    A) 11.\[\Omega ,\] 17.5A

    B) 30.\[\Omega ,\]6.5A

    C) 40.\[\Omega ,\] 5 A

    D) 50\[\Omega ,\] 4 A

    View Answer play_arrow
  • question_answer100) The coils of a step down transformer have 501 and 5000 turns. In the primary coil an AC of 4 A at 2200 V is sent. The value of the current and potential difference in secondary coil will be

    A) 20 A, 220V

    B) 0.4 A, 22000V

    C) 40 A, 220 V

    D) 40 A, 22000 V

    View Answer play_arrow
  • question_answer101) The maximum number of electrons in an atom with \[l=2\] and \[n=3\] is

    A) \[2\]

    B) \[6\]

    C) \[12\]

    D) \[10\]

    View Answer play_arrow
  • question_answer102) Which of the following expressions gives the de-Broglie relationship?

    A) \[\frac{h}{mv}=p\]

    B) \[\lambda =\frac{h}{mv}\]

    C) \[\lambda =\frac{h}{mp}\]

    D) \[\lambda m=\frac{v}{p}\]

    View Answer play_arrow
  • question_answer103) What is the electronic configuration: \[C{{u}^{2+}}(Z=29)\] of least position?

    A) \[[Ar]4{{s}^{1}},3{{d}^{8}}\]

    B) \[[Ar]4{{s}^{2}},3{{d}^{10}},4{{p}^{1}}\]

    C) \[[Ar]4{{s}^{1}},3{{d}^{10}}\]

    D) \[[Ar]3{{d}^{9}}\]

    View Answer play_arrow
  • question_answer104) Which of the following orbitals has a dumb-bell shape?

    A) \[s\]

    B) \[p\]

    C) \[d\]

    D) \[f\]

    View Answer play_arrow
  • question_answer105) The electronic configuration of metal M is \[1{{s}^{2}},2{{s}^{2}}2{{p}^{6}},3{{s}^{1}},\]The formula of its oxide will be

    A) \[MO\]

    B) \[{{M}_{2}}O\]

    C) \[{{M}_{2}}{{O}_{3}}\]

    D) \[M{{O}_{2}}\]

    View Answer play_arrow
  • question_answer106) Which of the following statements regarding covalent bond is not true?

    A) The electrons are shared between atoms.

    B) The bond is non-directional.

    C) The strength of the bond depends upon the extent of overlapping.

    D) The bonds formed may or may not be polar.

    View Answer play_arrow
  • question_answer107) Directed bonds in water form an angle of

    A) \[{{90}^{o}}\]

    B) \[{{120}^{o}}\]

    C) \[{{104.5}^{o}}\]

    D) \[{{60}^{o}}\]

    View Answer play_arrow
  • question_answer108) Hydrogen bonding is not present in

    A) glycerine

    B) water

    C) hydrogen sulphide

    D) hydrogen fluoride

    View Answer play_arrow
  • question_answer109) \[s{{p}^{3}}\]hybridisation leads to which shape of the molecule?

    A) Tetrahedron

    B) Octahedron

    C) Linear

    D) Plane triangle

    View Answer play_arrow
  • question_answer110) Which one of the following is not an ideal solution?

    A) \[{{C}_{2}}{{H}_{5}}Br,{{C}_{2}}{{H}_{5}}I\,\,mixture\]

    B) \[{{C}_{6}}{{H}_{5}}Cl,{{C}_{6}}{{H}_{5}}Br\,mixture\]

    C) \[{{C}_{6}}{{H}_{6}},{{C}_{6}}{{H}_{5}}C{{H}_{3}}\,mixture\]

    D) \[{{C}_{2}}{{H}_{5}}I,{{C}_{2}}{{H}_{5}}OH\,mixture\]

    View Answer play_arrow
  • question_answer111) "The relative lowering of vapour pressure is equal to the mole fraction of the solute." This law is called

    A) Henry's law

    B) Raoult's law

    C) Ostwald's law

    D) Arrhenius's law

    View Answer play_arrow
  • question_answer112) The order of osmotic pressures of equimolar solutions of \[BaC{{l}_{2}},\]\[~NaCl\] and glucose will be

    A) \[BaC{{l}_{2}}>NaCl>glucose\]

    B) \[NaCl>BaC{{l}_{2}}>glucose\]

    C) \[glucose>BaC{{l}_{2}}>NaCl\]

    D) \[glucose>NaCl>BaC{{l}_{2}}\]

    View Answer play_arrow
  • question_answer113) Molal depression constant for water is\[{{1.86}^{o}}C\] The freezing point of a \[0.05\]molal solution of a non-electrolyte in water, is

    A) \[-{{1.86}^{o}}C\]

    B) \[-{{0.93}^{o}}C\]

    C) \[-{{0.093}^{o}}C~\]

    D) \[{{0.93}^{o}}C\]

    View Answer play_arrow
  • question_answer114) How many mL of \[1M\] \[{{H}_{2}}S{{O}_{4}}\] is required to neutralise \[10\text{ }mL\]of \[1M\] \[NaOH\]solution?

    A) \[2.5\]

    B) \[5.0\]

    C) \[10.0\]

    D) \[20.0\]

    View Answer play_arrow
  • question_answer115) The correct statement in the following is

    A) The ionic crystal of \[AgBr\]has Schottky defect

    B) The unit cell having crystal parameters, \[a=b\ne c,\] \[\alpha =\beta ={{90}^{o}},\] \[\gamma ={{120}^{o}}\]is hexagonal

    C) In ionic compounds having Frenkel defect, the ratio \[{{r}_{+}}/{{r}_{-}}\] is high

    D) The coordination number of \[N{{a}^{+}}\] ion in \[NaCl\]is 4

    View Answer play_arrow
  • question_answer116) The number of atoms in unit cell of \[NaCl\]crystal is

    A) \[2\]

    B) \[4\]

    C) \[6\]

    D) \[8\]

    View Answer play_arrow
  • question_answer117) The average life period of a radioactive element is reciprocal of its

    A) half-life period

    B) disintegration constant

    C) number of atoms present at any time

    D) number of neutrons

    View Answer play_arrow
  • question_answer118) Uranium ultimately decays into a stable isotope of

    A) radium

    B) carbon

    C) lead

    D) neptunium

    View Answer play_arrow
  • question_answer119) An isotope \[_{Y}^{X}A\] undergoes a series of m alpha and n beta disintegration to form a stable isotope\[_{Y-10}^{X-32}B\]. The values of m and n are respectively

    A) \[6\] and \[8\]

    B) \[8\] and \[10\]

    C) \[5\] and \[8\]

    D) \[8\] and \[6\]

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  • question_answer120) A substance used as a moderator in a nuclear reactor is

    A) cadmium

    B) uranium-235

    C) lead

    D) heavy water

    View Answer play_arrow
  • question_answer121) For which one of the following reactions\[{{K}_{p}}={{K}_{c}}\]?

    A) \[{{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}\]

    B) \[{{N}_{2}}+{{O}_{2}}\rightleftharpoons 2NO\]

    C) \[PC{{l}_{5}}\rightleftharpoons PC{{l}_{3}}+C{{l}_{2}}\]

    D) \[2S{{O}_{3}}\rightleftharpoons 2S{{O}_{2}}+{{O}_{2}}\]

    View Answer play_arrow
  • question_answer122) The equilibrium constant for the reversible reaction, \[{{N}_{2}}+3{{H}_{2}}\rightleftharpoons 2N{{H}_{3}}\] is K and for the reaction \[\frac{1}{2}{{N}_{2}}+\frac{3}{2}{{H}_{2}}\rightleftharpoons N{{H}_{3}},\] the equilibrium constant is \[K'\]. K and \[K'\] will be related as

    A) \[K=K'\]

    B) \[K=\sqrt{K}\]

    C) \[K=\sqrt{K'}\]

    D) \[K\times K'=1\]

    View Answer play_arrow
  • question_answer123) At \[{{20}^{o}}C\]the \[A{{g}^{+}}\] ion concentration in a saturated solution of \[A{{g}_{2}}Cr{{O}_{4}}\] is \[1.5\times {{10}^{-4}}mol/L\]. At \[{{20}^{o}}C\]the solubility product of \[A{{g}_{2}}Cr{{O}_{4}}\] would be

    A) \[3.3750\times {{10}^{-12}}~\]

    B) \[1.6875\times {{10}^{-10}}\]

    C) \[1.6875\times {{10}^{-12}}\]

    D) \[1.6875\times {{10}^{-11}}\]

    View Answer play_arrow
  • question_answer124) What will be the pH of a \[{{10}^{-8}}M\]\[HCl\] solution?

    A) \[8.0\]

    B) \[7.0\]

    C) \[6.98\]

    D) \[14.0\]

    View Answer play_arrow
  • question_answer125) Which of the following can act both as Bronsted acid and a Bronsted base?

    A) \[N{{a}_{2}}C{{O}_{3}}\]

    B) \[O{{H}^{-}}\]

    C) \[HC{{O}_{3}}\]

    D) \[N{{H}_{3}}\]

    View Answer play_arrow
  • question_answer126) What will be the sum of pH and pOH in an aqueous solution?

    A) \[7\]

    B) \[p{{K}_{w}}\]

    C) Zero

    D) \[1\]

    View Answer play_arrow
  • question_answer127) Given that the dissociation constant for \[{{H}_{2}}O\] is \[{{K}_{w}}=1\times {{10}^{-14}}\] what is the pH of a M \[KOH\] solution?

    A) \[11\]

    B) \[3\]

    C) \[14\]

    D) \[{{10}^{-11}}\]

    View Answer play_arrow
  • question_answer128) The relation between \[\Delta G\] and E for cell is \[\Delta G=-nFE;\] the cell reaction will be spontaneous, if

    A) G is negative

    B) G is positive

    C) E is negative

    D) E is positive

    View Answer play_arrow
  • question_answer129) For an adiabatic process

    A) \[Q=0\]

    B) \[Q=-W\]

    C) \[Q=+W\]

    D) \[p\,\Delta V=0\]where Q, W, p and AV denote heat, work, pressure and change in volume respectively.

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  • question_answer130) Decrease of free energy of a reacting system points to a/an

    A) exothermic reaction

    B) equilibrium reaction

    C) spontaneous reaction

    D) isothermal reaction

    View Answer play_arrow
  • question_answer131) When a solid is converted into liquid, entropy

    A) becomes zero

    B) remains the same

    C) decreases

    D) increases

    View Answer play_arrow
  • question_answer132) Carbon and carbon monoxide bum in oxygen to form carbon dioxide according to the following reactions \[C+{{O}_{2}}\xrightarrow{{}}C{{O}_{2}};\] \[\Delta H=-394\,kJ\,mo{{l}^{-1}}\] \[2CO+{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}};\] \[\Delta H=-569\,kJ\,mo{{l}^{-1}}\] The heat of formation of \[1\text{ }mole\]of monoxide is, thus

    A) \[-219.0\text{ }kJ\text{ }mo{{l}^{-1}}\]

    B) \[-109.5\text{ }kJ\text{ }mo{{l}^{-1}}\]

    C) \[-175.0\text{ }kJ\text{ }mo{{l}^{-1}}\]

    D) \[-87.5\text{ }kJ\text{ }mo{{l}^{-1}}\]

    View Answer play_arrow
  • question_answer133) The thermal decomposition of a compound is of first order. If a sample of the compound decomposes 50% in 120 min, in what time will it undergo 90% decomposition?

    A) \[Nearly\text{ }240\text{ }min\]

    B) \[Nearly\text{ }480\text{ }min\]

    C) \[Nearly\text{ }450\text{ }min\]

    D) \[Nearly\text{ }400\text{ }min\]

    View Answer play_arrow
  • question_answer134) The order of a reaction with rate equal to \[kC_{A}^{3/2}C_{B}^{-1/2},\] is

    A) \[2\]

    B) \[1\]

    C) \[-\frac{1}{2}\]

    D) \[\frac{3}{2}\]

    View Answer play_arrow
  • question_answer135) The unit of cell constant is

    A) \[oh{{m}^{-1}}\,c{{m}^{-1}}\]

    B) \[ohm\text{ }cm\]

    C) \[cm~\]

    D) \[cm{{~}^{-1}}\]

    View Answer play_arrow
  • question_answer136) The chemical reaction taking place at he anode of a cell is

    A) ionisation

    B) reduction

    C) oxidation

    D) hydrolysis

    View Answer play_arrow
  • question_answer137) In dry cell, the reaction which takes place at the graphite anode is

    A) \[Z{{n}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Zn(s)\]

    B) \[Zn(s)+2{{e}^{-}}\xrightarrow{{}}Zn(s)\]

    C) \[M{{n}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Mn(s)\]

    D) \[Mn(s)\xrightarrow{{}}M{{n}^{+}}+{{e}^{-}}1.5V\]

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  • question_answer138) The metal which gives hydrogen on treatment with acid as well as sodium hydroxide is

    A) iron

    B) zinc

    C) copper

    D) None of these

    View Answer play_arrow
  • question_answer139) Chlorine cannot displace

    A) fluorine from \[NaF\]

    B) iodine from \[NaI\]

    C) bromine from \[NaBr\]

    D) None of the above

    View Answer play_arrow
  • question_answer140) Milk is an example of

    A) emulsion

    B) suspension

    C) sol

    D) gel

    View Answer play_arrow
  • question_answer141) Fog is a colloidal system of

    A) gas in liquid

    B) liquid in gas

    C) gas in gas

    D) solid in gas

    View Answer play_arrow
  • question_answer142) In physical adsorption, the gas molecules are held on solid surface by

    A) chemical forces

    B) electrostatic forces

    C) gravitational forces

    D) van der Waals' forces

    View Answer play_arrow
  • question_answer143) Hoope's process is used in the refining of

    A) \[Al\]

    B) \[Zn\]

    C) \[Ag\]

    D) \[Cu\]

    View Answer play_arrow
  • question_answer144) Red lead is

    A) \[P{{b}_{3}}{{O}_{4}}\]

    B) \[PbO\]

    C) \[Pb{{O}_{2}}\]

    D) \[P{{b}_{4}}{{O}_{3}}\]

    View Answer play_arrow
  • question_answer145) Solder metal is

    A) \[Pb\text{ + }Sb\]

    B) \[Pb+Sn\]

    C) \[Cu+Sn\]

    D) \[Cu+Zn\]

    View Answer play_arrow
  • question_answer146) In the manufacture of iron from hematite the function of lime stone is as

    A) reducing agent

    B) flux

    C) slag

    D) gangue

    View Answer play_arrow
  • question_answer147) Blister copper is

    A) pure copper

    B) copper ore

    C) 2% impure copper

    D) copper alloy

    View Answer play_arrow
  • question_answer148) The purest from of iron is

    A) cast iron

    B) pig iron

    C) wrought iron

    D) steel

    View Answer play_arrow
  • question_answer149) Who developed the long form of periodic table?

    A) Lothar Meyer

    B) Neils Bohr

    C) Mendeleef

    D) Moseley

    View Answer play_arrow
  • question_answer150) The correct sequence of elements in decreasing order of first ionisation energy is

    A) \[Na>Mg>Al~\]

    B) \[Mg>Na>Al\]

    C) \[Al>Mg>Na~\]

    D) \[Mg>Al>Na\]

    View Answer play_arrow
  • question_answer151) Which of the following statements is correct?

    A) \[{{X}^{-}}\] ion is larger in size than X atom

    B) \[{{X}^{+}}\] ion is larger in size than X atom

    C) \[{{X}^{+}}\] ion is larger in size than \[{{X}^{-}}\] ion

    D) \[{{X}^{+}}\] and \[{{X}^{-}}\] ions are equal in size

    View Answer play_arrow
  • question_answer152) The correct order of electron affinity of B, C, N, O is

    A) \[O>C>N>B\]

    B) \[B>N>C>O\]

    C) \[\text{O}>C>B>N\]

    D) \[\text{O}>B>C>N\]

    View Answer play_arrow
  • question_answer153) The ionic radius of which of the following would be maximum?

    A) \[{{C}^{4-}}\]

    B) \[{{N}^{3-}}\]

    C) \[{{O}^{2-}}\]

    D) \[M{{g}^{2+}}\]

    View Answer play_arrow
  • question_answer154) The atomic radius of elements of which of the following series would be nearly the same?

    A) \[Na,K,Rb,Cs\]

    B) \[Li,Be,B,C\]

    C) \[Fe,Co,Ni,Cu~\]

    D) \[F,Cl,Br,I\]

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  • question_answer155) Gradual addition of electronic shells in the noble gases causes a decrease in their

    A) ionisation energy

    B) atomic radius

    C) boiling point

    D) density

    View Answer play_arrow
  • question_answer156) Monazite is a source of

    A) \[Ne\]

    B) \[Ra\]

    C) \[Kr\]

    D) \[Th\]

    View Answer play_arrow
  • question_answer157) Which forms coloured ion?

    A) Metalloids

    B) Non-metals

    C) p-block elements

    D) Transition elements

    View Answer play_arrow
  • question_answer158) Prussian blue is

    A) \[F{{e}_{4}}{{[Fe{{(CN)}_{6}}]}_{3}}\]

    B) \[F{{e}_{2}}[Fe{{(CN)}_{6}}]\]

    C) \[F{{e}_{3}}[Fe{{(CN)}_{6}}]\]

    D) \[Fe{{[Fe{{(CN)}_{6}}]}_{2}}\]

    View Answer play_arrow
  • question_answer159) The highest oxidation state is shown by that transition element which has outermost configuration as

    A) \[{{d}^{3}}{{s}^{2}}\]

    B) \[{{d}^{5}}{{s}^{1}}\]

    C) \[{{d}^{5}}{{s}^{2}}\]

    D) \[{{d}^{8}}{{s}^{2}}\]

    View Answer play_arrow
  • question_answer160) Which of the following oxides is white but becomes yellow on heating?

    A) \[AgO\]

    B) \[A{{g}_{2}}O\]

    C) \[FeO\]

    D) \[ZnO\]

    View Answer play_arrow
  • question_answer161) Which of the following ions gives coloured solution?

    A) \[C{{u}^{+}}\]

    B) \[Z{{n}^{2+}}\]

    C) \[A{{g}^{+}}\]

    D) \[F{{e}^{2+}}\]

    View Answer play_arrow
  • question_answer162) On heating \[Mn{{(OH)}_{2}}\] with \[Pb{{O}_{2}}\]and cone. \[HN{{O}_{3}}\] pink colour is obtained due to the formation of

    A) \[KMn{{O}_{4}}\]

    B) \[HMn{{O}_{4}}\]

    C) \[Pb{{(Mn{{O}_{4}})}_{2}}\]

    D) \[PbMn{{O}_{4}}\]

    View Answer play_arrow
  • question_answer163) On the basis of Le-Chatelier's principle, predict which of the following conditions would be unfavorable for the formation of \[S{{O}_{3}}\]? Given that: \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\,\,\Delta H=-42kcal\]

    A) Low temperature

    B) High pressure

    C) High temperature

    D) High concentration of \[S{{O}_{2}}\]

    View Answer play_arrow
  • question_answer164) An element \[(X)\] forms compounds of the formulae \[XC{{l}_{3}},\] \[{{X}_{2}}{{O}_{5}}\] and \[C{{a}_{3}}{{X}_{2}}\] but does not form \[XC{{l}_{5}}\]. Which of the following is the element X?

    A) \[B\]

    B) \[Al\]

    C) \[N\]

    D) \[P\]

    View Answer play_arrow
  • question_answer165) Which of the following oxides of nitrogen reacts with ferrous sulphate to form a dark brown compound?

    A) \[{{N}_{2}}O\]

    B) \[NO\]

    C) \[N{{O}_{2}}\]

    D) \[{{N}_{2}}{{O}_{3}}\]

    View Answer play_arrow
  • question_answer166) Which of the following halogens does not form oxyacid?

    A) Fluorine

    B) Chlorine

    C) Bromine

    D) Iodine

    View Answer play_arrow
  • question_answer167) The strongest of the following acids, is

    A) \[HBr\]

    B) \[HCl\]

    C) \[HF\]

    D) \[HI\]

    View Answer play_arrow
  • question_answer168) Nessler's reagent is

    A) \[KHg{{I}_{4}}\]

    B) \[{{K}_{2}}Hg{{I}_{4}}+N{{H}_{4}}OH\]

    C) \[{{K}_{2}}Hg{{I}_{4}}+KOH\]

    D) \[KHg{{I}_{4}}+N{{H}_{4}}OH\]

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  • question_answer169) Helium is used with oxygen in the apparatus of divers because it

    A) is lighter than nitrogen

    B) is not soluble in blood at high pressure

    C) is easily available

    D) is less reactive than nitrogen

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  • question_answer170) Which of the following is a favourable facer ' for cation formation?

    A) Low ionisation potential

    B) High electron affinity

    C) High electronegativity

    D) Small atomic size

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  • question_answer171) Very dilute nitric add reacts with zinc to far- zinc nitrate and

    A) amonium nitrate

    B) \[N{{O}_{2}}\]

    C) \[NO\]

    D) \[~{{N}_{2}}O\]

    View Answer play_arrow
  • question_answer172) Unlike other halogens, fluorine does not show higher oxidation states, because

    A) it is highly electronegative

    B) it has no d-orbitals

    C) its atomic radius is very small

    D) The \[{{F}^{-}}\] ion is stable and isoelectronic with neon

    View Answer play_arrow
  • question_answer173) Which of the following hydrides has the lowest boiling point?

    A) \[{{H}_{2}}O\]

    B) \[{{H}_{2}}S\]

    C) \[{{H}_{2}}Se\]

    D) \[{{H}_{2}}Te\]

    View Answer play_arrow
  • question_answer174) The number of isomers possible for square planar complex \[{{K}_{2}}[PdClB{{r}_{2}}(SCN)]\] is

    A) \[2\]

    B) \[3\]

    C) \[4\]

    D) \[6\]

    View Answer play_arrow
  • question_answer175) IUPAC name of \[[Co{{(N{{H}_{3}})}_{3}}({{H}_{2}}O)Cl]C{{l}_{2}}\]is

    A) Diaquachlorodiaminecobalt (III) chloride

    B) Triaminediaquachlorocobalt (III) chloride

    C) Chlorodiaminediaquacobalt (II) chloride

    D) Diaminediaquachlorocobalt (II) chloride

    View Answer play_arrow
  • question_answer176) Which of the following exhibits highest molar conductivity?

    A) \[[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]

    B) \[[Co{{(N{{H}_{3}})}_{5}}Cl]C{{l}_{2}}\]

    C) \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl\]

    D) \[[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]\]

    View Answer play_arrow
  • question_answer177) In tris (ethylene diamine) cobalt (III) chloride the coordination number of cobalt is

    A) \[3\]

    B) \[4\]

    C) \[6\]

    D) \[7\]

    View Answer play_arrow
  • question_answer178) The ion that can be precipitated by \[HCl\] as well as \[{{H}_{2}}S\] is

    A) \[P{{b}^{2+}}\]

    B) \[F{{e}^{3+}}\]

    C) \[Z{{n}^{2+}}\]

    D) \[C{{u}^{2+}}\]

    View Answer play_arrow
  • question_answer179) A salt on treatment with dil. \[HCl\] give: pungent smelling gas and a yellow precipitate The salt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is

    A) \[NiS{{O}_{4}}\]

    B) \[Ba{{S}_{2}}{{O}_{3}}\]

    C) \[Pb{{S}_{2}}{{O}_{3}}\]

    D) \[CuS{{O}_{4}}\]

    View Answer play_arrow
  • question_answer180) Which of the following is not used as an explosive?

    A) Trinitrotoluene

    B) Trinitrobenzene

    C) Picric acid

    D) Nitrobenzene

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  • question_answer181) Which of the following will have geometrical isomers?

    A) 2-methylpropene

    B) 2-butene

    C) 1-butene

    D) Propene

    View Answer play_arrow
  • question_answer182) Which statement is true for cyclohexane?

    A) It has two possible isomers

    B) It has three conformations

    C) Boat conformation is most stable

    D) Chair and boat conformations differ in energy by \[44\text{ }kJ/mol\]

    View Answer play_arrow
  • question_answer183) A hydrocarbon has \[C\text{ }85.72%\]and remaining H. The hydrocarbon is

    A) \[{{C}_{2}}{{H}_{4}}\]

    B) \[{{C}_{2}}{{H}_{6}}\]

    C) \[{{C}_{2}}{{H}_{2}}\]

    D) \[C{{H}_{4}}\]

    View Answer play_arrow
  • question_answer184) Which of the following has highest octane number?

    A) n-hexane

    B) n-heptane

    C) iso-octane

    D) n-heptane and iso-octane mixed in ratio \[50:50\]

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  • question_answer185) Which of the following is obtained at lowest temperature by fractional distillation of petroleum?

    A) Ligroin

    B) Gasoline

    C) Kerosene

    D) Diesel oil

    View Answer play_arrow
  • question_answer186) The order of stability of carbonium ions is

    A) \[methyl>ethyl>iso-propyl>tert-butyl\]

    B) \[tert-butyl>iso-propyl>ethyl>methyl\]

    C) \[iso-propyl>tert-butyl>ethyl>methyl\]

    D) \[tert-butyl>ethyl>iso-propyl>methyl\]

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  • question_answer187) The compound which gives only acetaldehyde on ozonolysis is

    A) butene-1

    B) butene-2

    C) ethylene

    D) propylene

    View Answer play_arrow
  • question_answer188) Which of the following is used to distinguish ethylene and acetylene?

    A) Alkaline \[KMn{{O}_{4}}\]

    B) Bromine water

    C) Ammoniacal cuprous chloride

    D) Conc.\[{{H}_{2}}S{{O}_{4}}\]

    View Answer play_arrow
  • question_answer189) Carbons in the compound l-butene-3-yne are

    A) \[sp\] hybridized

    B) \[s{{p}^{2}}\]hybridized

    C) \[sp\] and \[s{{p}^{2}}\] hybridized

    D) \[sp,\] \[s{{p}^{2}}\]and \[s{{p}^{3}}\]hybridized

    View Answer play_arrow
  • question_answer190) In nitration of benzene with cone. \[HN{{O}_{3}}\] and cone. \[{{H}_{2}}S{{O}_{4}},\] the species which takes active part is

    A) nitrite ion

    B) nitrate ion

    C) nitroniumion

    D) nitrogen peroxide

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  • question_answer191) Ethyl bromide on treatment with alcoholic \[KOH\] gives

    A) ethylene

    B) ethanol

    C) acetic acid

    D) ethane

    View Answer play_arrow
  • question_answer192) \[AgN{{O}_{3}}\] does not give precipitate with chloroform because

    A) \[CHC{{1}_{3}}\]is insoluble in water

    B) \[CHC{{1}_{3}}\]does not ionise in water

    C) \[CHC{{1}_{3}}\] is an organic compound

    D) \[AgN{{O}_{3}}\]is insoluble in \[CHC{{1}_{3}}\]

    View Answer play_arrow
  • question_answer193) Benzene reacts with chlorine to form benzene hex chloride in presence of

    A) nickel

    B) \[AlC{{l}_{3}}\]

    C) bright sunlight

    D) zinc

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  • question_answer194) Which of the following compounds gives a ketone with Grignard reagent?

    A) Formaldehyde

    B) Ethyl alcohol

    C) Methyl cyanide

    D) Methyl iodide

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  • question_answer195) Which one of the following compounds gives a positive iodofonn test?

    A) Pentanal

    B) 1-phenyl ethanol

    C) 2-phenyl ethanol

    D) 3-pentanol

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  • question_answer196) Reaction of acetaldehyde with \[HCN\] followed by hydrolysis gives a compound which shows

    A) optical isomerism

    B) geometrical isomerism

    C) metamerism

    D) tautomerism

    View Answer play_arrow
  • question_answer197) A compound A has a molecular formula \[{{C}_{2}}C{{l}_{3}}OH\]. It reduces Fehling solution and on oxidation gives a monocarboxylic acid .A is obtained by action of chlorine on ethyl alcohol. A is

    A) chloral

    B) \[C{{H}_{3}}Cl\]

    C) \[C{{H}_{3}}Cl\]

    D) chloroacetic acid

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  • question_answer198) Which of the following is not a synthetic polymer?

    A) Polyethylene

    B) PVC

    C) Nylon

    D) Cellophane

    View Answer play_arrow
  • question_answer199) Iodine value is related to

    A) fats and oils

    B) alcohols

    C) esters

    D) hydrocarbons

    View Answer play_arrow
  • question_answer200) Deficiency of which vitamin causes rickets?

    A) Vitamin C

    B) Vitamin D

    C) Vitamin A

    D) Vitamin K

    View Answer play_arrow
  • question_answer201) Epithelial tissue serves as

    A) protective sheath

    B) reproductive structures

    C) corpuscle

    D) nerve cells

    View Answer play_arrow
  • question_answer202) Muscular tissue is differentiated into

    A) unstriped, striped

    B) striped, cardiac

    C) unstriped, cardiac muscle

    D) unstriped, striated and cardiac

    View Answer play_arrow
  • question_answer203) The units of the nervous system are

    A) neurons

    B) dendrites

    C) axon

    D) cyton

    View Answer play_arrow
  • question_answer204) The hardest substance of vertebrate body is

    A) keratin

    B) enamel

    C) dentine

    D) chondrin

    View Answer play_arrow
  • question_answer205) Role of bone marrow in mammals is

    A) to assist kidneys

    B) to act as haemopoietic tissue

    C) to assist liver

    D) to control blood pressure

    View Answer play_arrow
  • question_answer206) Which of these contains vocal cords?

    A) Pharynx

    B) Larynx

    C) Glottis

    D) Bronchial tube

    View Answer play_arrow
  • question_answer207) Which of the following glands is present in frog's skin and not in rabbit's skin?

    A) Sebaceous gland

    B) Sweat gland

    C) Mucous gland

    D) Moll's gland

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  • question_answer208) How many kinds of cells are found in islets of Langerhans?

    A) 1

    B) 2

    C) 3

    D) 4

    View Answer play_arrow
  • question_answer209) Which type of cells secretes \[\text{HCl}\] in stomach'

    A) Chief cells

    B) Oxyntic cells

    C) Peneth cells

    D) Goblet cells

    View Answer play_arrow
  • question_answer210) The pungent odour of faeces is due to ne presence of

    A) indole and skatole

    B) skatole only

    C) phenol and hydrogen sulphide

    D) All of the above

    View Answer play_arrow
  • question_answer211) Which one of the following enzymes initials protein digestion?

    A) Amino peptidase

    B) Carboxy peptidase

    C) Trypsin

    D) Pepsin

    View Answer play_arrow
  • question_answer212) Haemoglobin is having maximum affinity with

    A) \[C{{C}_{2}}\]

    B) CO

    C) \[{{O}_{2}}\]

    D) \[N{{H}_{3}}\]

    View Answer play_arrow
  • question_answer213) In our body, the blood bank is

    A) red bone marrow

    B) spleen

    C) liver

    D) heart

    View Answer play_arrow
  • question_answer214) Down's syndrome is

    A) autosomal abnormality

    B) sex chromosomal abnormality

    C) sex-linked disease

    D) None of the above

    View Answer play_arrow
  • question_answer215) The wall of heart is made up of

    A) epicardium

    B) myocardium

    C) endocardium

    D) All of these

    View Answer play_arrow
  • question_answer216) Carbonic anhydrase is present in high concentrations in

    A) plasma

    B) erythrocytes

    C) leucocytes

    D) nephrons

    View Answer play_arrow
  • question_answer217) How many molecules of oxygen can bound to one molecule of haemoglobin?

    A) 1

    B) 2

    C) 3

    D) 4

    View Answer play_arrow
  • question_answer218) Why do we pass more urine in wet and cold season?

    A) Impairment of water absorption by nephrons

    B) Kidney becomes more active

    C) Sweating is much reduced

    D) ADH secretion is increased

    View Answer play_arrow
  • question_answer219) What for the ascending limb of loop of Henie is permeable?

    A) Glucose

    B) \[N{{H}_{3}}\]

    C) Na

    D) Water

    View Answer play_arrow
  • question_answer220) Which is the correct explanatory word for the composition of protoplasm?

    A) Emulsion

    B) Suspension

    C) Complex colloidal solution

    D) Molecular solution

    View Answer play_arrow
  • question_answer221) Which part of mammalian brain controls the muscular co-ordination?

    A) Cerebrum

    B) Cerebellum

    C) Corpus callosum

    D) Medulla

    View Answer play_arrow
  • question_answer222) Name of nervous band connecting cerebral hemispheres in rabbit is

    A) corpus callosum

    B) corpus albicans

    C) corpus striatum

    D) corpus spongiosum

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  • question_answer223) Lateral ventricles are found in

    A) heart

    B) brain

    C) thyroid

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer224) In which bee barbless sting is found?

    A) Drones

    B) Workers

    C) Queen bee

    D) All of these

    View Answer play_arrow
  • question_answer225) When are the identical twins born?

    A) One sperm fertilizes two ova

    B) One ovum is fertilized by two sperms

    C) Two ova are fertilized by two sperms

    D) One fertilized ovum divides into two blastomeres and both of them separate

    View Answer play_arrow
  • question_answer226) One mole glucose, on complete oxidation, yields energy

    A) 686 cal

    B) 68,600 cal

    C) 6,86,000 cal

    D) 68,60,000 cal

    View Answer play_arrow
  • question_answer227) The points of sperm entry during fertilization forms

    A) centre of rotation of embryo

    B) axis of cleavage

    C) grey crescent

    D) dorsal lip of blastopore

    View Answer play_arrow
  • question_answer228) Seminiferous tubules are found in

    A) testis

    B) ovary

    C) kidney

    D) lung

    View Answer play_arrow
  • question_answer229) Corpus luteum is formed in

    A) ovary

    B) testis

    C) mammary gland

    D) uterus

    View Answer play_arrow
  • question_answer230) Fimbriated funnel is

    A) proximal part of oviduct

    B) uterus part

    C) urinary bladder part

    D) ureter part

    View Answer play_arrow
  • question_answer231) Oogenesis comprises

    A) multiplication phase

    B) growth phase

    C) maturation phase

    D) All of the above

    View Answer play_arrow
  • question_answer232) Acrosome is found in the sperm at

    A) top part

    B) middle piece

    C) behind the nucleus

    D) tail part

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  • question_answer233) In mammals, the number of cervical vertebra is

    A) 5

    B) 7

    C) 10

    D) 12

    View Answer play_arrow
  • question_answer234) In mammals, the lower jaw is made up of

    A) dentaries

    B) maxilla

    C) premaxilla

    D) palatine

    View Answer play_arrow
  • question_answer235) In mammals, each half of pectoral girdle consists of

    A) supra scapula

    B) scapula

    C) coracoid

    D) All of these

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  • question_answer236) In mammals, each half of pelvic girdle consists of

    A) ilium

    B) ischium

    C) pubis

    D) All of these

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  • question_answer237) Ear drum is known as

    A) tympanic membrane

    B) tensor tympani

    C) scala tympani

    D) scala vestibule

    View Answer play_arrow
  • question_answer238) Function of lacrimal glands is

    A) to secrete mucous

    B) to secrete tears

    C) to secrete oil

    D) to secrete fat

    View Answer play_arrow
  • question_answer239) Life saving hormone is secreted by which gland?

    A) Adrenal gland

    B) Hypothalamus

    C) Pituitary gland

    D) Thyroid gland

    View Answer play_arrow
  • question_answer240) The disease caused by deficiency of iodine is

    A) cretinism

    B) myxedema

    C) goitre

    D) tetany

    View Answer play_arrow
  • question_answer241) The disease caused by deficiency of parathormone is

    A) cretinism

    B) tetany

    C) hypercalemia

    D) myxoedema

    View Answer play_arrow
  • question_answer242) Cretinism is due to less secretion of

    A) thyroid gland

    B) pituitary gland

    C) parathyroid gland

    D) adrenal gland

    View Answer play_arrow
  • question_answer243) Which endocrine gland becomes inactive in old age?

    A) adrenal

    B) pineal

    C) thymus

    D) pituitary

    View Answer play_arrow
  • question_answer244) In males, the essential hormone for secondary sexual characteristics is

    A) testosterone

    B) progesterone

    C) estrogen

    D) relaxin

    View Answer play_arrow
  • question_answer245) In females, the essential hormone for secondary sexual characteristics is

    A) testosterone

    B) progesterone

    C) estrogen

    D) relaxin

    View Answer play_arrow
  • question_answer246) Pellagra disease is caused due to deficiency of vitamin

    A) B

    B) C

    C) D

    D) E

    View Answer play_arrow
  • question_answer247) Submucosa is thickest in

    A) stomach

    B) oesophagus

    C) intestine

    D) rectum

    View Answer play_arrow
  • question_answer248) Mineral deposition in bones and teeth is due to vitamin

    A) D

    B) A

    C) C

    D) E

    View Answer play_arrow
  • question_answer249) Which is the urinary bladder of the child placed in the womb?

    A) Urinary bladder

    B) Amnion

    C) Allantois

    D) Liver

    View Answer play_arrow
  • question_answer250) What is the cause of haemophilia?

    A) Chromosomal aberration

    B) Somatic mutation

    C) X-linked mutation

    D) All of the above

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  • question_answer251) The term blastocyst is applied to the blastula of which one of the following?

    A) Kangaroo

    B) Platypus

    C) Monkey

    D) Both [a] and [c]

    View Answer play_arrow
  • question_answer252) The outer layer of the blastocyst which forms the ectoderm, is called

    A) cnidoblast

    B) germinal vesicle

    C) trophoblast

    D) amnion

    View Answer play_arrow
  • question_answer253) The foetal membrane, which is the source of first blood corpuscle to enter the circulation the embryo, is called

    A) amnion

    B) chorion

    C) trophoblast

    D) yolk sac

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  • question_answer254) Growth in most warm blooded vertebrates is

    A) determinate

    B) indeterminate

    C) uncontrolled

    D) None of the above

    View Answer play_arrow
  • question_answer255) The ability of animals to regenerate the lost parts of the body was reported by

    A) Carlson

    B) Trembley

    C) Patten

    D) Storer

    View Answer play_arrow
  • question_answer256) Improvement of genetic characters and present day generation on the basis of best nutrition and training is called

    A) Eugenics

    B) Euphenics

    C) Euthenics

    D) Gerontology

    View Answer play_arrow
  • question_answer257) The 'Cell theory" states that

    A) all cells have nuclei

    B) cells are the fundamental structural mat of plants and animals

    C) all cells are living

    D) cells reproduce by mitosis and meiosis

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  • question_answer258) Structure present over the chromosomes is

    A) nucleolus

    B) centromere

    C) centrosome

    D) Golgi complex

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  • question_answer259) Normally the number of chromosomes in the nuclei of gametes that fuse at fertilization are

    A) innumerable

    B) dissimilar

    C) similar

    D) None of these

    View Answer play_arrow
  • question_answer260) Balbiani discovered special type of chromosome from the salivary gland of Chironomus larva, which are recognized by the presence of

    A) bands

    B) loops

    C) Both [a] and [b]

    D) All of these

    View Answer play_arrow
  • question_answer261) The technique which makes use of amniotic fluid for the detection of foetal disorders, is called as

    A) endoscopy

    B) laproscopy

    C) natal endoscopy

    D) amniocentesis

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  • question_answer262) Which of the following is not related to chromosomal aberration?

    A) Euploidy

    B) AIDS

    C) Aneuploidy

    D) Klinefelter's syndrome

    View Answer play_arrow
  • question_answer263) Immediately after ovulation, the mammalian egg is covered by an outermost membrane, called as

    A) vitelline membrane

    B) chorion

    C) zona pellucid

    D) corona radiate

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  • question_answer264) The number of autosomes in man is

    A) 22 pairs

    B) 11 pairs

    C) 43 pairs

    D) 23 pairs

    View Answer play_arrow
  • question_answer265) Supermale and super female type determination of sex in Drosophila is base on

    A) genie balance

    B) oxygen balance

    C) biodiversity

    D) uniformity

    View Answer play_arrow
  • question_answer266) A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of sons).

    A) all colourblind

    B) 50% colourblind

    C) all normal

    D) 25% colourblind

    View Answer play_arrow
  • question_answer267) Marriage between one of the following pairs may cause child death

    A) \[R{{h}^{+}}\] father and \[R{{h}^{-}}\]mother

    B) \[K{{h}^{+}}\] father and \[R{{h}^{+}}\]mother

    C) \[R{{h}^{-}}\] father and \[R{{h}^{-}}\] mother

    D) \[R{{h}^{-}}\] father and \[R{{h}^{+}}\]mother

    View Answer play_arrow
  • question_answer268) Donors and recipients in a blood transfusion process can be

    A) only father and son

    B) only brother and sister

    C) only maternal uncle and niece

    D) All of the above

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  • question_answer269) Which one of the following is not a mutagen?

    A) Acetic acid

    B) Hydroxylamine

    C) Nitrous acid

    D) Gamma rays

    View Answer play_arrow
  • question_answer270) The enzyme which can cut molecules of DNA into segments is known as

    A) DNA polymerase

    B) DNA ligase

    C) Restriction enzyme

    D) DNA gyrase

    View Answer play_arrow
  • question_answer271) Point mutation is a change, which involves

    A) loss of a gene

    B) addition of a gene

    C) deletion of a segment of a gene

    D) change in a base of a gene

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  • question_answer272) The percentage ratio of natality over mortality is called

    A) vital index

    B) population density

    C) total count of individuals

    D) fertility rate

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  • question_answer273) Which is non-poisonous?

    A) Spider

    B) Scorpion

    C) Centipede

    D) Crab

    View Answer play_arrow
  • question_answer274) Electric organs are found in

    A) sharks

    B) porpoises

    C) goldfish

    D) rays

    View Answer play_arrow
  • question_answer275) Which monkey has prehensile tail?

    A) Spider monkey

    B) Semnopithecus

    C) Rhesus monkey

    D) Boinnet monkey

    View Answer play_arrow
  • question_answer276) Which of the following is in tracheate group?

    A) Crab-centipede-cockroach

    B) King Crab-scorpion-housefly

    C) Spider-Peripatus-mosquito

    D) Bedbug-sandfly-silkworm

    View Answer play_arrow
  • question_answer277) Which is filter feeder?

    A) Amoeba

    B) Leech

    C) Spider

    D) Paramedum

    View Answer play_arrow
  • question_answer278) Whose skin colour does not change?

    A) Chamaeleon

    B) Horse

    C) Garden lizard

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer279) Phylogeny tells about

    A) life history of animals

    B) group of phyla

    C) evolutionary history of a species from its ancestors

    D) castes of flies

    View Answer play_arrow
  • question_answer280) Which one of the following scientists is not related with organic evolution?

    A) Erasmus Darwin

    B) Charles Darwin

    C) Darlington

    D) TR Malthus

    View Answer play_arrow
  • question_answer281) Modemtheory of organic evolution is based on

    A) population

    B) mutation

    C) isolation

    D) All of these

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  • question_answer282) A vestigial organ of man is

    A) vermiform appendix

    B) sebaceous gland

    C) pelvic girdle

    D) mammary gland

    View Answer play_arrow
  • question_answer283) The wings of an insect and a bat exhibit

    A) homology

    B) analogy

    C) atavism

    D) connecting link

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  • question_answer284) The material for organic evolution is

    A) effect of hormones

    B) nutritive value

    C) mutation

    D) asexual reproduction

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  • question_answer285) The nearest prehistoric ancestor of present man may be

    A) Java ape man

    B) Cro-magnon man

    C) Neanderthal man

    D) Peking man

    View Answer play_arrow
  • question_answer286) Silkworm is a

    A) fly

    B) worm

    C) moth

    D) beetle

    View Answer play_arrow
  • question_answer287) Who is referred to as father of pearl industry ?

    A) Ivanowski

    B) Louis Pasteur

    C) Kokichi Mikimoto

    D) Harvey

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  • question_answer288) Plasmodium in man is inoculated by

    A) Anopheles male

    B) Anopheles female

    C) Culex female

    D) Both [a] and [b]

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  • question_answer289) 'Malaria', a common disease worldwide, b caused by a

    A) bacterium

    B) virion

    C) Protozoa

    D) helminthes

    View Answer play_arrow
  • question_answer290) HIV causes reduction in

    A) T-helper cells only

    B) All T-cells

    C) B-cells only

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer291) Biological name of insect (vector) carrying the plague is

    A) Xenopsylla cheopis

    B) Anopheles mosquito

    C) Bacillus pestis

    D) Pediculus humanus

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  • question_answer292) A molecule that elicites an immune response is called

    A) antibody

    B) antigen

    C) mutagen

    D) carcinogen

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  • question_answer293) Malarial parasite completes its life-cycle in

    A) one host

    B) two hosts

    C) three hosts

    D) reservoir host

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  • question_answer294) Metabolic waste responsible for malaria fever is called

    A) haemozoin

    B) haematin

    C) melanin

    D) heparin

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  • question_answer295) A pearl oyster secretes pearls to

    A) regenerate injured parts

    B) protect itself against invading parasite

    C) harden its mantle cavity

    D) isolate damaged tissues of the body

    View Answer play_arrow
  • question_answer296) Addiction to tobacco is caused by the presence of

    A) caffiene

    B) nicotine

    C) cocaine

    D) histamine

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  • question_answer297) Which of the following organ is most affected by alcohol?

    A) Kidney

    B) Heart

    C) Liver

    D) Lungs

    View Answer play_arrow
  • question_answer298) Kanha National Park is famous for

    A) birds

    B) rhinoceros

    C) tigers

    D) crocodiles

    View Answer play_arrow
  • question_answer299) Malathion, parathion and fenitrothion belong to the group of

    A) carbamates

    B) organophosphates

    C) pyrethroids

    D) marines

    View Answer play_arrow
  • question_answer300) Which of the following when dissolved in water make (s) Bordeaux mixture?

    A) Copper sulphate

    B) Calcium oxide

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer301) The significance of meiosis lies in

    A) maintaining constancy in the number of chromosomes in an organism

    B) production of genetic variability in the population of species

    C) Reduction of the diploid number of chromosomes to haploid

    D) All of the above

    View Answer play_arrow
  • question_answer302) Which among the following can be seen only under the electron microscope?

    A) Chloroplast

    B) Ribosome

    C) Leucoplast

    D) Nucleus

    View Answer play_arrow
  • question_answer303) The name 'protoplasm' was given by

    A) Hooke

    B) A K Sharma

    C) Schwann

    D) Purkinje

    View Answer play_arrow
  • question_answer304) A mature plant cell has

    A) cell wall and protoplasm

    B) protoplasm and vacuole

    C) vacuole and cell wall

    D) Both [b] and [c]

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  • question_answer305) The larger sub-unit in 80S ribosome is

    A) 50S

    B) 60S

    C) 40S

    D) 0S

    View Answer play_arrow
  • question_answer306) Golgi bodies are absent in

    A) plants

    B) bacteria

    C) animals

    D) eukaryotic cells

    View Answer play_arrow
  • question_answer307) Endoplasmic reticulum is more developed in

    A) green cells

    B) young cells

    C) mature cells

    D) bacteriophage

    View Answer play_arrow
  • question_answer308) Mitochondria are related to

    A) prokaryotes

    B) plasmids

    C) plastids

    D) viruses

    View Answer play_arrow
  • question_answer309) The main function of lysosomes is

    A) digestion

    B) replication

    C) translation

    D) translocation

    View Answer play_arrow
  • question_answer310) The physical basis of life is

    A) nucleus

    B) sex chromosomes

    C) protoplasm

    D) DNA

    View Answer play_arrow
  • question_answer311) Which of the following has a single membrane?

    A) Ribosome

    B) Peroxisome

    C) Nucleolus

    D) Centrosome

    View Answer play_arrow
  • question_answer312) DNA molecules of each chromosome become double in

    A) \[{{\text{G}}_{\text{1}}}\text{-}\]phase

    B) \[{{\text{G}}_{2}}\text{-}\]phase

    C) S-phase

    D) M-phase

    View Answer play_arrow
  • question_answer313) L-shaped chromosomes are called

    A) sex-chromosome

    B) acrocentric

    C) telocentric

    D) sub-metacentric

    View Answer play_arrow
  • question_answer314) Pairing of homologous chromosomes takes place in

    A) pachytene

    B) zygotene

    C) diplotene

    D) None of these

    View Answer play_arrow
  • question_answer315) How many meiotic divisions will be necessary to produce two hundred pollen grains?

    A) 100

    B) 199

    C) 50

    D) 200

    View Answer play_arrow
  • question_answer316) Which of the following is a purine ?

    A) Prokaryotes

    B) Guanine

    C) Thymine

    D) Uracil

    View Answer play_arrow
  • question_answer317) Which type of ribosomes are found in Nostoc cells?

    A) 50S

    B) 60S

    C) 70S

    D) Eukaryotic

    View Answer play_arrow
  • question_answer318) A change in the chromosome number is called

    A) chromosomal mutation

    B) gene mutation

    C) somatic mutation

    D) polyploidy

    View Answer play_arrow
  • question_answer319) Who coined the term 'chromosome'?

    A) Balbiani

    B) Waldeyer

    C) Sutton

    D) Purkinje

    View Answer play_arrow
  • question_answer320) A chromosome having sub-terminal centromere is called

    A) telocentric

    B) acrocentric

    C) metacentric

    D) sub-metacentric

    View Answer play_arrow
  • question_answer321) How many pairs of contrasting characters were chosen by Mendel for his study with garden pea?

    A) 3

    B) 5

    C) 7

    D) 14

    View Answer play_arrow
  • question_answer322) The term 'all elomorphic' implies

    A) any two characters

    B) a pair of contrasting characters

    C) sex-linked characters

    D) a pair of non-contrasting characters

    View Answer play_arrow
  • question_answer323) If a homozygous red flowered plant is crossed with a homozygous white-flowered plant, the offspring will be

    A) all red flowered

    B) all white flowered

    C) half red flowered

    D) half white flowered

    View Answer play_arrow
  • question_answer324) An asexually produced organism inheriting all the characters of its parent is called

    A) clone

    B) offspring

    C) hybrid

    D) variety

    View Answer play_arrow
  • question_answer325) What would be the colour of flowers in \[{{F}_{1}}\] progeny as a result of a cross between homozygous red and homozygous white flowered snapdragon?

    A) Red

    B) White

    C) Both [a] and

    D) [d] Pink

    View Answer play_arrow
  • question_answer326) 26. Who postulated the 'chromosomal theory of \[{{F}_{1}}\]inheritance'?

    A) de Vries

    B) Mendel

    C) Sutton and Boveri

    D) Morgan

    View Answer play_arrow
  • question_answer327) Drosophila melanogaster has

    A) 2 pairs of autosomes and 1 pair of us chromosomes

    B) 3 pairs of autosomes and 1 pair of sex chromosomes

    C) 1 pair of autosomes and 3 pairs of sex chromosomes

    D) 2 pairs of autosomes and 2 pairs of sex chromosomes

    View Answer play_arrow
  • question_answer328) The nature of DNA replication is

    A) conservative

    B) non-conservative

    C) semi-conservative

    D) cyanobacteria

    View Answer play_arrow
  • question_answer329) Transformation in bacteria was first discovered by

    A) Lederberg

    B) Griffith

    C) Fimbriae

    D) Tatum

    View Answer play_arrow
  • question_answer330) The drug streptomycin inhibits the process of

    A) prokaryotic translation

    B) eukaryotic translation

    C) prokaryotic transcription

    D) eukaryotic transcription

    View Answer play_arrow
  • question_answer331) The sexuality in bacteria was established by

    A) Lederberg and Tatum

    B) H J Muller

    C) Hargobind Khorana

    D) Ochoa and Kornberg

    View Answer play_arrow
  • question_answer332) The N2 fixing bacterium associated with root nodules of legumes is known as

    A) Azotobacter

    B) Nitrobacter

    C) Lactobacillus

    D) Rhizobium

    View Answer play_arrow
  • question_answer333) The filterable property of Tobacco Mosaic Virus (TMV) was shown by

    A) Ivanowski

    B) Beijerinck

    C) Stanley

    D) Winogradsky

    View Answer play_arrow
  • question_answer334) The bacteria which convert nitrate on molecular nitrogen are called

    A) nitrifying bacteria

    B) methanobacteria

    C) diazotrophic bacteria

    D) denitrifying bacteria

    View Answer play_arrow
  • question_answer335) Endosulphon is a

    A) herbicide

    B) weedicide

    C) rodenticide

    D) pesticide

    View Answer play_arrow
  • question_answer336) The germ theory of disease was propounded by

    A) Koch

    B) Pasteur

    C) Rayer

    D) Devaine

    View Answer play_arrow
  • question_answer337) Interferons are useful in controlling

    A) TB

    B) cancer

    C) malaria

    D) blood pressure

    View Answer play_arrow
  • question_answer338) Yeast is used in the formation of

    A) ammonia

    B) alcohol

    C) curd

    D) petrol

    View Answer play_arrow
  • question_answer339) Fermentation is represented by equation

    A) \[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{+}\,\text{6}{{\text{0}}_{\text{2}}}\to \text{6C}{{\text{O}}_{\text{2}}}\text{+}\,\text{6}{{\text{H}}_{\text{2}}}\text{+}\,\text{673}\,\text{kcal}\]

    B) \[{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\xrightarrow{{}}\text{2}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH+}\,\text{2C}{{\text{O}}_{\text{2}}}\text{+}21\,\text{kcal}\]

    C) \[6C{{O}_{2}}+12{{H}_{2}}O\to {{\text{C}}_{6}}{{\text{H}}_{12}}{{\text{O}}_{\text{2}}}+{{60}_{2}}\,\]

    D) \[\text{6C}{{\text{O}}_{\text{2}}}\text{+6}{{\text{H}}_{\text{2}}}\text{O}\frac{\text{Light}}{\text{Chlorophyll}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{12}}}{{\text{O}}_{\text{6}}}\text{+6}{{\text{0}}_{\text{2}}}\,\]

    View Answer play_arrow
  • question_answer340) Common bread mould is

    A) yeast

    B) Mucor

    C) bacteria

    D) virus

    View Answer play_arrow
  • question_answer341) Viruses contain

    A) only DNA

    B) only RNA

    C) either DNA or RNA

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer342) The nitrogen fixation by Nostoc takes place in

    A) vegetative cells

    B) akinetes

    C) heterocysts

    D) hormogonia

    View Answer play_arrow
  • question_answer343) The smallest free-living organism is

    A) virus

    B) mycoplasma

    C) cyanobacteria

    D) bacteria

    View Answer play_arrow
  • question_answer344) The bacterium capable of anaerobic N2 fixation is known as

    A) Clostridium

    B) Bacillus

    C) Azotobacter

    D) Khizobium

    View Answer play_arrow
  • question_answer345) Cyanophages attack

    A) cyanobacteria

    B) bacteria

    C) fungi

    D) lichens

    View Answer play_arrow
  • question_answer346) The bacterial genome contains

    A) DNA and histone

    B) DNA or histone

    C) DNA without histone

    D) Neither DNA nor histone

    View Answer play_arrow
  • question_answer347) Which one of the following statements is correct?

    A) Viruses are obligate parasites

    B) All fungi are pathogenic

    C) All algae are eukaryotic

    D) Bacteria are always harmful to mankind

    View Answer play_arrow
  • question_answer348) The characteristic pigment of cyanobacteria is

    A) fucoxanthin

    B) chl-b

    C) anthocyanin

    D) phycocyanin

    View Answer play_arrow
  • question_answer349) An antiviral chemical produced by the animal cell is

    A) virion

    B) interferon

    C) represser protein

    D) hormone

    View Answer play_arrow
  • question_answer350) The division of the plant kingdom into Prokaryota and Eukaryota is based on the character of

    A) nucleus only

    B) chromosomes only

    C) cell organelles only

    D) All of the above

    View Answer play_arrow
  • question_answer351) Who is credited with the introduction of binomial system of nomenclature of plants?

    A) Linnaeus

    B) John Ray

    C) Bentham and Hooker

    D) Aristotle

    View Answer play_arrow
  • question_answer352) Sexual reproduction in Spirogyra is morpho logically characterized by

    A) oogamy

    B) anisogamy

    C) isogamy

    D) Both [a] and [b]

    View Answer play_arrow
  • question_answer353) The moss plants develop from

    A) diploid spores

    B) protonema

    C) oospores

    D) antherozoids

    View Answer play_arrow
  • question_answer354) Zygospores are formed in?

    A) Puccinia

    B) Penidllium

    C) Altemaria

    D) Mucor

    View Answer play_arrow
  • question_answer355) Fern plant is a

    A) haploid gametophyte

    B) diploid gametophyte

    C) diploid sporophyte

    D) haploid sporophyte

    View Answer play_arrow
  • question_answer356) How much time is generally required/taken by the pine plant from pollination to fertilization?

    A) Four months

    B) Twelve months

    C) Two years

    D) Four years

    View Answer play_arrow
  • question_answer357) Pyrenoids are characteristically found in the chloroplast of

    A) fungi

    B) algae

    C) pteridophytes

    D) angiosperms

    View Answer play_arrow
  • question_answer358) Caruncle is formed by

    A) peduncle

    B) cotyledons

    C) integument

    D) None of these

    View Answer play_arrow
  • question_answer359) Perisperm is

    A) outer part of endosperm

    B) destroyed synergids

    C) destroyed secondary nucleus

    D) remains of nucellus

    View Answer play_arrow
  • question_answer360) In pea, the ovule is

    A) hemianatropous

    B) amphitropous

    C) anatropous

    D) campylotropous

    View Answer play_arrow
  • question_answer361) The point where funicle joins with ovule is known as

    A) chalaza

    B) hilum

    C) integument

    D) micropyle

    View Answer play_arrow
  • question_answer362) Aerenchyma is formed in the tissue of

    A) sclerenchyma

    B) parenchyma

    C) phloem

    D) None of these

    View Answer play_arrow
  • question_answer363) Promeristem gives rise to which meristem?

    A) Secondary

    B) Lateral

    C) Primary

    D) Apical

    View Answer play_arrow
  • question_answer364) Whose living cells provide tensile and mechanical strength?

    A) Collenchyma

    B) Sclerenchyma

    C) Phloem

    D) Sclereids

    View Answer play_arrow
  • question_answer365) Which one is not related with plant ash?

    A) Trace elements

    B) Essential elements

    C) Nitrogen

    D) Mineral elements

    View Answer play_arrow
  • question_answer366) 0.1 M solution of a solute has a water potential of

    A) - 2.3 bars

    B) zero bar

    C) 22.4 bars

    D) + 2.3 bars

    View Answer play_arrow
  • question_answer367) A small mesophytic twig with green leaves is dipped into water in a big beaker under sunlight. It demonstrates

    A) photosynthesis

    B) respiration

    C) transpiration

    D) None of these

    View Answer play_arrow
  • question_answer368) Which one is not related to transpiration

    A) Regulation of plant body temperature

    B) Absorption and distribution of mineral salts

    C) Circulation of water

    D) Bleeding

    View Answer play_arrow
  • question_answer369) Which element is essential for photolysis of water?

    A) Nitrogen

    B) Chlorine

    C) Carbon

    D) Oxygen

    View Answer play_arrow
  • question_answer370) In \[{{C}_{4}}\] plants, initial \[C{{O}_{2}}\] fixation takes place in the chloroplasts of

    A) guard cells

    B) spongy mesophyll

    C) palisade tissue

    D) bundle sheath

    View Answer play_arrow
  • question_answer371) Which of the following is formed during respiration?

    A) \[{{O}_{2}}\] (oxygen)

    B) \[C{{O}_{2}}\] (carbon dioxide)

    C) \[N{{O}_{2}}\] (nitrogen dioxide)

    D) \[S{{O}_{2}}\] (sulphur dioxide)

    View Answer play_arrow
  • question_answer372) The pyruvic acid formed in glycolysis is oxidized to \[C{{O}_{2}}\] and \[{{H}_{2}}O\] in a cycle called

    A) Calvin cycle

    B) Hill reaction

    C) Krebs cycle

    D) Nitrogen cycle

    View Answer play_arrow
  • question_answer373) Nitrogenase enzyme is found in Nostoc in the cell of

    A) vegetative

    B) heterocyst

    C) Both [a] and [b]

    D) None of these

    View Answer play_arrow
  • question_answer374) Many of the hydrolytic reactions are

    A) reversible

    B) irreversible

    C) endothermic

    D) exothermic

    View Answer play_arrow
  • question_answer375) Most of the plants are seasonal due to

    A) photoperiodism

    B) phototropism

    C) photosynthesis

    D) photolysis

    View Answer play_arrow
  • question_answer376) Certain chemical sbstances having profound effect on growth are called

    A) catalytic agents

    B) phytohormones

    C) enzymes

    D) compost

    View Answer play_arrow
  • question_answer377) The pyramid of energy in a forest ecosystem is

    A) always upright

    B) always inverted

    C) Both [a] and [b]

    D) None of these

    View Answer play_arrow
  • question_answer378) The importance of ecosystem lies in

    A) flow of energy

    B) cycling of materials

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer379) Which one of the following is a renewable source of energy?

    A) Petroleum

    B) Coal

    C) Nuclear fuel

    D) Trees

    View Answer play_arrow
  • question_answer380) The correct path of energy flow in an ecosystem is

    A) Producers \[\to \]Carnivores\[\to \] Herbivores \[\to \] Decomposers

    B) Producers\[\to \]Herbivores \[\to \]Carnivores\[\to \]Decomposers

    C) Herbivores \[\to \]Carnivores\[\to \] Producers \[\to \] Decomposers

    D) Herbivores \[\to \] Producers \[\to \] Carnivores\[\to \] Decomposers

    View Answer play_arrow
  • question_answer381) The number of primary producers within a specified area would be maximum in

    A) grassland ecosystem

    B) forest ecosystem

    C) pond ecosystem

    D) deserts

    View Answer play_arrow
  • question_answer382) A food chain starts with

    A) nitrogen fixationing organisms

    B) photosynthesizing organisms

    C) respiration

    D) decomposers

    View Answer play_arrow
  • question_answer383) Nepenthes is a

    A) primary producer

    B) consumer

    C) Both [a] and [b]

    D) None of the above

    View Answer play_arrow
  • question_answer384) Spraying of DDT on crops produces pollution of

    A) air only

    B) air and soil only

    C) air and water only

    D) All of the above

    View Answer play_arrow
  • question_answer385) Which of the following is most important source of food?

    A) Lichen

    B) Angiosperms

    C) Algae

    D) Fungi

    View Answer play_arrow
  • question_answer386) Which of the following is a pseudocereal

    A) Triticum aestivum

    B) Oryza sativa

    C) Zea mays

    D) Fagopyrum esculentum

    View Answer play_arrow
  • question_answer387) Which of the following is rich source of protein?

    A) Rice

    B) Wheat

    C) Groundnut

    D) Pearl millet

    View Answer play_arrow
  • question_answer388) Which of the following is surface fibre?

    A) Coir

    B) Cotton

    C) Sunnhemp

    D) Manilahemp

    View Answer play_arrow
  • question_answer389) Which of the following is not a plant fibre?

    A) Cotton

    B) Coir

    C) Sunnhemp

    D) Silk

    View Answer play_arrow
  • question_answer390) Triticum aestivum is

    A) haploid

    B) diploid

    C) tetraploid

    D) hexaploid

    View Answer play_arrow
  • question_answer391) Which of the following is an oilseed crop ?

    A) Careopsis

    B) Paddy

    C) Sunflower

    D) Chrysanthemum

    View Answer play_arrow
  • question_answer392) Richest source of carbohydrate is

    A) Sorghum

    B) groundnut

    C) gram

    D) wheat

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  • question_answer393) Plants which yield pulses belong to family

    A) Papilionaceae

    B) Rosaceae

    C) Malvaceae

    D) Compositae

    View Answer play_arrow
  • question_answer394) Which state of India is the largest producer of jute?

    A) West Bengal

    B) Uttar Pradesh

    C) Bihar

    D) Madhya Pradesh

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  • question_answer395) From which part of plant, cotton fibres are obtained?

    A) Root hairs

    B) Stem hairs

    C) Leaf

    D) Seed hairs

    View Answer play_arrow
  • question_answer396) In which part of plant, groundnut oil is stored?

    A) Leaf

    B) Tuber

    C) Cotyledon

    D) Root

    View Answer play_arrow
  • question_answer397) Food can be easily preserved at low temperature because at low temperature

    A) the food can easily be digested

    B) the food can easily be cooked

    C) the bacterial attack on food is minimized

    D) All of the above

    View Answer play_arrow
  • question_answer398) Selection is the method of

    A) Plant physiology

    B) Plant breeding

    C) Genetics

    D) Cytology

    View Answer play_arrow
  • question_answer399) Removal of anthers from flowers buds is called

    A) bagging

    B) hybridization

    C) emasculation

    D) heterosis

    View Answer play_arrow
  • question_answer400) What are the main objectives of plant breeding?

    A) More yield

    B) Better quality

    C) Stress resistance

    D) All of these

    View Answer play_arrow

   

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